powerpc/64e: drop MMU_FTR_TYPE_FSL_E checks in 64-bit code

powerpc/64e: drop MMU_FTR_TYPE_FSL_E checks in 64-bit code

All 64-bit Book3E have MMU_FTR_TYPE_FSL_E, since A2 was removed, so remove
checks for it in 64-bit only code.

Link: https://lkml.kernel.org/r/2b0b0bc9752e6cece222e4e2050358da70bb631d.1719928057.git.christophe.leroy@csgroup.eu
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>